desc.grid.QuadratureGrid
- class desc.grid.QuadratureGrid(L, M, N, NFP=1)Source
Grid used for numerical quadrature.
Exactly integrates a Fourier-Zernike basis of resolution (L,M,N) This grid is never symmetric.
- Parameters:
L (int) – radial grid resolution (exactly integrates radial modes up to order L)
M (int) – poloidal grid resolution (exactly integrates poloidal modes up to order M)
N (int) – toroidal grid resolution (exactly integrates toroidal modes up to order N)
NFP (int) – number of field periods (Default = 1)
Methods
change_resolution
(L, M, N[, NFP])Change the resolution of the grid.
compress
(x[, surface_label])Return elements of
x
at indices of unique surface label values.copy
([deepcopy])Return a (deep)copy of this object.
equiv
(other)Compare equivalence between DESC objects.
expand
(x[, surface_label])Expand
x
by duplicating elements to match the grid's pattern.load
(load_from[, file_format])Initialize from file.
replace_at_axis
(x, y[, copy])Replace elements of
x
with elements ofy
at the axis of grid.save
(file_name[, file_format, file_mode])Save the object.
Attributes
Radial grid resolution.
Poloidal grid resolution.
Toroidal grid resolution.
Number of (toroidal) field periods.
Indices of nodes at magnetic axis.
Indices of unique_rho_idx that recover the rho coordinates.
Indices of unique_theta_idx that recover the theta coordinates.
Indices of unique_zeta_idx that recover the zeta coordinates.
Pattern for placement of nodes in (rho,theta,zeta).
Node coordinates, in (rho,theta,zeta).
Total number of nodes.
Number of unique rho coordinates.
Number of unique theta coordinates.
Number of unique zeta coordinates.
Node spacing, in (rho,theta,zeta).
True for stellarator symmetry, False otherwise.
Indices of unique rho coordinates.
Indices of unique theta coordinates.
Indices of unique zeta coordinates.
Weight for each node, either exact quadrature or volume based.